Bently Nevada 330103-00-03-10-02-05 – 3300 XL 11 mm Proximity Probe for Critical Machinery Vibration/Displacement Monitoring

The Bently Nevada 330103-00-03-10-02-05 is part of the 3300 XL proximity probe system, used worldwide for non-contact shaft vibration and axial position measurements on turbines, compressors, large motors, and gearboxes. From my experience, this 11 mm probe format is chosen when you need a robust target area and a generous linear range, while keeping full compatibility with the standard 3300 XL Proximitor Sensor and 330130 extension cables. You might notice that it drops directly into many API 670-oriented protection schemes—handy when you’re standardizing across fleets.

Typical use cases include: monitoring shaft radial vibration on steam/GT trains, thrust position on high-load bearings, and slow-roll/run-up diagnostics where stable gapping is critical. One thing I appreciate is the mechanical durability of the 3300 XL assembly; it seems to hold up in harsher environments where cheaper probes drift or lose calibration too quickly.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 11 mm 3300 XL probe format – Favored on larger shaft diameters and applications needing a wider linear range and solid mechanical margin.
• Non-contact eddy-current sensing – Measures shaft vibration and position without physical contact, avoiding wear and heat transfer.
• System compatibility – Works with 3300 XL Proximitor Sensor and 330130 extension cables; a straightforward upgrade/replacement path.
• Stable performance in harsh conditions – Typically rated for high temperatures; the XL design is known for long-term stability and low drift.
• Threaded mounting with locknut – Simple, secure installation in bearing housings or probe brackets; gapping procedure is repeatable.
• API 670-aligned usage – Commonly applied in API 670 machine protection loops when installed with the proper Proximitor and cabling.

Technical Specifications

Application Fields

• Steam and gas turbines – radial vibration and thrust position monitoring tied to trip logic.
• Pipeline compressors – continuous vibration trending for early bearing fault detection.
• Large motors and generators – shaft runout, alignment checks, and slow-roll verification.
• Gearboxes and expanders – shaft relative vibration in high-load, high-temperature zones.

A maintenance lead recently told us they swapped several probes to this exact 330103 build on a turbine train; the immediate benefit was steadier gapping during thermal transitions. That kind of small reliability win typically prevents nuisance alarms later.

Advantages & Value

• Reliability first – The 3300 XL line is known for long-term stability and low noise, which in many cases reduces false trips.
• Drop-in compatibility – Keeps existing 3300 XL Proximitor and 330130 cable architecture; fewer surprises during turnaround work.
• Procurement flexibility – Common build codes are typically in stock, making outage planning cleaner.
• Lifecycle economy – Fewer re-gaps, fewer premature pull-and-replace events; that’s real saved labor over a year.
• Technical support – Guidance on gapping, shielding, and routing practices to keep your noise floor low.

Installation & Maintenance

• Mounting – Install in a rigid bracket or bearing housing with the supplied thread and locknut; verify perpendicularity to the target and maintain the specified gap range.
• Cabinet & routing – Route the coax away from high-voltage lines; terminate at the 3300 XL Proximitor in a ventilated cabinet (standard industrial enclosure is typically fine).
• Grounding/shielding – Bond shields at the Proximitor end; avoid multiple earths that can create loops.
• Safety – Lockout/tagout rotating equipment; confirm that probe tip cannot contact the rotating shaft at any operating condition.
• Routine checks – Periodic gap verification at outages; inspect cable armor and connectors; clean probe face gently to remove oil/varnish films.
• System updates – Keep the monitoring rack firmware current and re-validate scale factors after any component changes.

Quality & Certifications

• Manufactured under ISO 9001 quality systems (typical for Bently Nevada production).
• CE marking; RoHS-type material compliance on mainstream builds.
• Hazardous-area approvals (CSA/ATEX/IECEx) are available on specific option codes.
• Manufacturer warranty is typically 1 year; we provide a 365-day warranty on supplied units.

Supporting Components (Common Pairings)

• Bently Nevada 330130-0x-xx-xx Extension Cable – Coaxial extension between probe and Proximitor; available in multiple lengths and armor options.
• Bently Nevada 3300 XL Proximitor Sensor (11 mm matching) – Signal conditioner providing the standard voltage output proportional to displacement/vibration.
• Mounting hardware & brackets – Locknuts, brackets, and adapters for bearing housings or proximity probe ports.